Japanese Industrial Standard

 JIS G3444  Carbon steel tubes for general structural purposes  STK
 JIS G3445  Carbon steel tubes for machine structural purposes  STKM
 JIS G3454  Carbon steel pipes for pressure survice  STPG
 JIS G3455  Carbon steel pipes for high pressure service  STS
 JIS G3456  Carbon steel pipes for high temperature service  STPT
 JIS G3461  Carbon steel boiler and heat exchanger tubes  STB

Registers of Shipping
 Lloyd's register of shipping  LRS

Foreign Specifications
 ASTM,A53,A106,A120,A179,A210,A513,A519,etc.
 BS3059
 SAE
 DIN
 Please consult us for any specifications other than the above mentioned.

Steel Tubes Further Processing
Cutting
 Bevel cutting
 Centerless grinding
 Bending
 Others